There was a show, didn't last on fixing, covering unwanted tattoos. Shop in SilverLake Los Angeles. The problem was they played it one time only, hard to find, so the show didn't last. He is a real artist.
Some reviews suggest that the original tattoos are fake, as the cover up colors weren't possible. There are plenty of bad tattoos; no need to fake. Cover up is a specialty. Biggest common problem Dirk seems to run into -- scar tissue, which is the sign of a bad tattooer. The problem I have with Dirk, is that he makes his tattoos too dense, with no open skin. I've seen others who do the same. His work could really benefit from some open skin. Comliments the tattoo, and makes it more readable.